linux-kernel - Re: [PATCH 0/2] fix the missing underflow in memory operation function

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Message-ID: <CACT4Y+aj20xfJ4nSR1piWcZTmANJ-kS8+ZcBfz6jG4ZTjR51yw@mail.gmail.com>
Date:   Mon, 14 Oct 2019 12:37:37 +0200
From:   Dmitry Vyukov <dvyukov@...gle.com>
To:     Walter Wu <walter-zh.wu@...iatek.com>
Cc:     Andrey Ryabinin <aryabinin@...tuozzo.com>,
        Alexander Potapenko <glider@...gle.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        kasan-dev <kasan-dev@...glegroups.com>,
        Linux-MM <linux-mm@...ck.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        linux-mediatek@...ts.infradead.org,
        wsd_upstream <wsd_upstream@...iatek.com>
Subject: Re: [PATCH 0/2] fix the missing underflow in memory operation function

On Mon, Oct 14, 2019 at 12:36 PM Dmitry Vyukov <dvyukov@...gle.com> wrote:
>
> On Mon, Oct 14, 2019 at 12:32 PM Walter Wu <walter-zh.wu@...iatek.com> wrote:
> >
> > The patchsets help to produce KASAN report when size is negative numbers
> > in memory operation function. It is helpful for programmer to solve the
> > undefined behavior issue. Patch 1 based on Dmitry's review and
> > suggestion, patch 2 is a test in order to verify the patch 1.
>
> Hi Walter,
>
> I only received this cover letter, but not the actual patches. I also
> don't see them in the group:
> https://groups.google.com/forum/#!forum/kasan-dev
> nor on internet. Have you mailed them? Where are they?

OK, received them just now.

> > [1]https://bugzilla.kernel.org/show_bug.cgi?id=199341
> > [2]https://lore.kernel.org/linux-arm-kernel/20190927034338.15813-1-walter-zh.wu@mediatek.com/
> >
> > Walter Wu (2):
> > kasan: detect negative size in memory operation function
> > kasan: add test for invalid size in memmove
> >
> > ---
> >  lib/test_kasan.c          | 18 ++++++++++++++++++
> >  mm/kasan/common.c         | 13 ++++++++-----
> >  mm/kasan/generic.c        |  5 +++++
> >  mm/kasan/generic_report.c | 18 ++++++++++++++++++
> >  mm/kasan/tags.c           |  5 +++++
> >  mm/kasan/tags_report.c    | 17 +++++++++++++++++
> >  6 files changed, 71 insertions(+), 5 deletions(-)
> >
> > --
> > 2.18.0
> >
> > --
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> > To view this discussion on the web visit https://groups.google.com/d/msgid/kasan-dev/20191014103148.17816-1-walter-zh.wu%40mediatek.com.